%0 Journal Article %A Kenderov, Petar %T Seventieth Anniversary of Professor Vesselin Stoyanov Drensky %J Mathematics and Education in Mathematics %D 2022 %P 23-31 %V 50 %I mathdoc %U http://geodesic.mathdoc.fr/item/MEM_2022_50_a0/ %G en %F MEM_2022_50_a0